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3L Filters™ by Thermon Heating Systems has exceeded the most demanding industrial filtration requirements for over 50 years. A broad range of standard and custom products includes liquid filters, strainers, separators, pressure vessels, and engineered products and systems. 3L Filters™ has special expertise for nuclear, petrochemical, water treatment and environmental applications.

3L Filters™ upholds the very highest standards of quality in the design and production of our filtration systems, which has made 3L Filters™ an industry leader in our field. Products are specifically designed to meet ASME VIII Div. 1 and/or Nuclear SEC III CL-1 standards. Additionally, 3L Filters™ has the capability to design and build engineered filtration systems and complete heating and filtration package solutions to customer specifications for virtually any application in any environment.